Variablea | Explanation/Notes | Value chosen | Reference |
Scenario Settings |
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# of iterations | # of times simulation is run | 1000 |
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# of years | # of years the population is modeled | 50 |
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Extinction definition | How extinction is defined in the model | 1 sex remains |
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# of populations | # of populations to be modeled | 1 | [40] |
Species Description |
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Inbreeding depression | The level and effect of inbreeding depression | 3.14 lethal equivalents; 50% due to alleles | [45] |
Reproductive System |
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Reproductive system | The mating system | Polygynous | [41] |
Age of first reproduction in F | Age at which F begin breeding | 2 | [44] |
Age of first reproduction in M | Age at which M begin breeding | 2 | [44] |
Maximum age of reproduction | Age of F/M when breeding ends | 13 | [44] |
Maximum # of progeny produced/year | Maximum # of offspring produced/F/year | 3 | [16] |
Sex ratio at birth | Sex ratio of offspring at birth | 1:1 | [16] [41] |
Density dependence in reproduction | Relationship between reproduction and population density | No relationship assumed |
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Reproductive Rates |
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% of adult F breeding | Proportion of F breeding each year | 62% | [42] |
EV in % breeding | Environmental variation in % of adult F breeding each year | 3.74 | [16] |
Distribution of # of offspring/F/year | Statistical distribution characterizing the # of offspring produced each year | Normal Distribution |
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Mean # of offspring/F |
| 2 | [16] |
SD in # of offspring/F |
| 0.5 |
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Mortality Rates |
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F mortality | Mortality of F as % and SD | 18%, SD = 5.09 | [38] |
M mortality | Mortality of M as % and SD | 3%, SD = 2.60 | [38] |
Mortality for age categories |
| No variation in survival across ages | [43] |
Mate Monopolization |
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% males in breeding pool | % of adult M breeding each year | 77% |
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Initial Population Size |
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Age distribution of initial population | Distribution of individuals by age at the beginning of the simulation | Stable age distribution |
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Initial population size | Number of individuals at the beginning of the simulation | 250 | [39] [40] [J. C. Sáenz, pers. comm.] |
Carrying Capacity |
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Carrying capacity (K) | Carrying capacity of the environment | 1000 | [3] |
SD in K | SD in carrying capacity of the environment | 200 |
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